Two different alkali-soluble alpha-glucans in hyphal walls of the basidiomycete Armillaria mellea.

Two different polysaccharidic subfractions were separated from the alkali soluble, acid precipitated alpha-glucan located in the surface of the hyphal walls of the basidiomycete Armillaria mella. The major alpha-glucan subfraction was composed of linear chains of alpha-(1->3) and alpha-(1->4) glucan associated to protein while the less represented was mainly an alpha-(1->3) glucan with some protein. Both polysaccharidic components could correspond with the fibrillar layer in which thick fibres are longitudinally oriented and thinner fibrils cross-arranged between the others.